Roof Temperatures In Summer

This actually speeds up the effects we looked at in the last paragraph.

Roof temperatures in summer.

Overall the plywood sheathing in black shingled roof systems tended to be 10 f to 15 f 5 c to 8 c warmer dur ing the midafternoon of a sunny day than the plywood in comparable white shingled roof systems. Let s look at the four most important roofing factors that affect the temperature of your home. Different sources report different temperatures. An unventilated attic can also exacerbate the problem and make damage more likely.

It s the ultraviolet radiation that they re subjected to all the time. An unshaded roof can reach temperatures of as much as 65 to 90 c. This also speeds up the damaging effect of the uv rays and causes other problems. Your roof bears the brunt of the sun s force and is exposed to a lot of heat during the summer.

What kills shingles isn t so much the temperature. The maximum sheathing temperatures recorded were 168 f 76 c for black shingled roofs and 147 f 64 c for white shingled roofs. This fsec study didn t look at shingle lifetime but i think that adding 9 degrees to a temperature of 150 degrees won t make much difference. Degrees fahrenheit on a sunny 90 degree day.

Color of your roof. A roof without shade might get up to 160 degrees f when the outside air temperature is only 90 degrees. Roofs that absorb more heat in the summer will also absorb more heat in the winter which can actually be a wonderful positive when it comes to melting snow and keeping your home toasty warm in the winter.